Brycon opalinus
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Brycon opalinus faces severe population declines primarily due to dam construction and river modifications throughout its range in southeastern Brazil's Atlantic coastal rivers. Deforestation in riparian zones has degraded water quality and reduced food availability, while overfishing has targeted this commercially valuable species. Agricultural runoff and urban pollution further compromise the clear, well-oxygenated waters this species requires for successful reproduction.
Habitat
Brycon opalinus inhabits clear, fast-flowing rivers and streams in the Atlantic Forest region of southeastern Brazil, particularly in the upper and middle reaches of coastal river systems. This species prefers well-oxygenated waters with rocky or sandy substrates and requires intact riparian vegetation for feeding and spawning.
